Method and apparatus for encoding channel quality indicator and precoding control information bits

Abstract

A method and apparatus for encoding channel quality indicator (CQI) and precoding control information (PCI) bits are disclosed. Each of the input bits, such as CQI bits and/or PCI bits, has a particular significance. The input bits are encoded with a linear block coding. The input bits are provided with an unequal error protection based on the significance of each input bit. The input bits may be duplicated based on the significance of each input bit and equal protection coding may be performed. A generator matrix for the encoding may be generated by elementary operation of conventional basis sequences to provide more protection to a most significant bit (MSB).

What is claimed is: 
     
       1. A method comprising:
 determining a quantized amplitude ratio based on whether multiple-input multiple-output (MIMO) mode is configured, wherein on a condition that MIMO mode is configured, the determining is based on a channel quality indicator (CQI) type; and 
 deriving a gain factor based on the quantized amplitude ratio. 
 
     
     
       2. The method of  claim 1 , wherein the quantized amplitude ratio is translated from a variable, and the value of the variable for CQI of type A is greater than the value of the variable for CQI of type B. 
     
     
       3. The method of  claim 1 , wherein the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI signaled by a higher layer on a condition that MIMO mode is not configured. 
     
     
       4. The method of  claim 1 , further comprising weighting a real-valued spread value using the gain factor. 
     
     
       5. The method of  claim 4 , wherein the real-valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI plus one on a condition that MIMO mode is configured and the CQI bits are of type A. 
     
     
       6. The method of  claim 5 , wherein the signaled value ΔCQI is signaled by a higher layer. 
     
     
       7. The method of  claim 4 , wherein the real-valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI on a condition that MIMO mode is configured and the CQI bits are of type B. 
     
     
       8. The method of  claim 1 , wherein the quantized amplitude ratio is translated to 38/15 on a condition that a signaled value ΔCQI equals to 9. 
     
     
       9. A wireless transmit/receive unit (WTRU) comprising:
 a processor configured to: 
 determine a quantized amplitude ratio based on whether multiple-input multiple-output (MIMO) mode is configured, wherein on a condition that MIMO mode is configured, the processor is configured to determine the quantized amplitude ratio based on a channel quality indicator (CQI) type, and 
 derive a gain factor based on the quantized amplitude ratio. 
 
     
     
       10. The WTRU of  claim 9 , wherein the quantized amplitude ratio is translated from a variable, and the value of the variable for CQI of type A is greater than the value of the variable for CQI of type B. 
     
     
       11. The WTRU of  claim 9 , wherein the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI signaled by a higher layer on a condition that MIMO mode is not configured. 
     
     
       12. The WTRU of  claim 9 , wherein the processor is configured to weight a real-valued spread value using the gain factor. 
     
     
       13. The WTRU of  claim 12 , wherein the real-valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI plus one on a condition that MIMO mode is configured and the CQI bits are of type A. 
     
     
       14. The WTRU of  claim 13 , wherein the signaled value ΔCQI is signaled by a higher layer. 
     
     
       15. The WTRU of  claim 12 , wherein the real-valued spread value comprises CQI bits, the quantized amplitude ratio is translated from a variable, and the variable equals a signaled value ΔCQI on a condition that MIMO mode is configured and the CQI bits are of type B. 
     
     
       16. The WTRU of  claim 9 , wherein the quantized amplitude ratio is translated to 38/15 on a condition that a signaled value ΔCQI equals to 9.